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Magnetic field is a region around a magnetic material or a moving electric charge within which the force of magnetism acts.

Device is extremly simple and consist only few components:

- Arduino nano microcontroller
- small Oled display
- Led and resistor
- and Hall effect sensor, in my case UGN 3503U.

It is important to use a ratiometric linear sensor that gives a voltage at its output that is proportional to the strength of the magnetic field. This sensor picks up field strength in the units of ‘GAUSS’, and its range is from 0 to +/- 900 Gauss. By using ADC feature we will convert output voltage to a number.”

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